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CVE-2026-65914

DOMPurify before 3.3.2 Mutation XSS via Re-Contextualization

Published: Jul 23, 2026Updated: Jul 28, 2026 Sources: CVE List NVDCWE-79
6.1MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 93.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

DOMPurify before 3.3.2 contains a mutation-XSS vulnerability when sanitized HTML is reinserted into special parsing contexts using innerHTML with wrappers like script, xmp, iframe, noembed, noframes, or noscript. Attackers can craft payloads with closing sequences that break out of the wrapper context during reparsing, reactivating dangerous markup with event handlers to execute JavaScript.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

cure53
aka dompurify
DOMPurifyLibrary
OSS Libraries / generic-library
and 1 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/cure53/DOMPurify/security/advisories/GHSA-h8r8-wccr-v5f2
github.com
https://www.vulncheck.com/advisories/dompurify-before-mutation-xss-via-re-contextualization
vulncheck.com

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